<title>清理浏览器缓存</title>
<meta http-equiv="Pragma" content="no-cache">
header("Cache-Control: no-cache, must-revalidate")
<meta http-equiv="Cache-Control" content="no-cache">
<meta http-equiv="Expires"  content="0">
<script> 
alert("清理成功！"); 
</script> 
</script> 
